Characterization of frequency drift of sampled-grating DBR laser module under direct modulation
Anandarajah, Prince M. and Maher, Robert D. and Barry, Liam P. and Kaszubowska-Anandarajah, Aleksandra and Connolly, Eoin M. and Farrell, Tom and McDonald, David (2008) Characterization of frequency drift of sampled-grating DBR laser module under direct modulation. IEEE Photonics Technology Letters, 20 (2). pp. 72-74. ISSN 1041-1135
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The authors demonstrate the drift in frequency of a static sampled-grating distributed Bragg reflector (SG DBR) laser module when it is subjected to direct modulation. The magnitude of drift and its settling time is characterized as a function of the index of modulation. Results show that when the directly modulated SG DBR is optically filtered, as in a dense wavelength- division- multiplexed system, a power penalty of 6.7 dB is incurred in comparison to the unfiltered case.
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